In case of using an external power supply for teensy 4.0, we disconnect the 5 Vdc that comes from USB cable and then direct feed the 5 Vdc Teensy bus. Is there any problem for the processor if the USB cable is connect to a computer without the IMXRT1062 be power supplied ? Could the D+ and D- signals coming from PC demage the processor if this processor is not 3,3 Vdc power supplied ?